The Bass method of tooth brushing (the Bass method) is also known as the horizontal chatter method or the gingival sulcus method. As an effective method of removing plaque near the gingival margin and in the gingival sulcus, the Bass method is most widely accepted because this area is most important for controlling gingival and periodontal infections. Indications: The Bass method removes plaque near the gingival margin and in the gingival sulcus, especially in the adjacent areas, the neck of the teeth and the exposed root surfaces, and is suitable for all populations as well as patients who have undergone periodontal surgery. [Methods of operation] The essentials of brushing 1, holding the brush handle, bristles pointing in the direction of the root tip (maxillary teeth upward, mandibular teeth downward), although the bristles are at an angle of 45 °, but it is usually easier and safer for the patient is first parallel to the long axis of the teeth, and then rotate slightly, and the gingival margin is at an angle of 45 °. 2. Bristle angle: Place the bristle end of the toothbrush in a position that points directly to the gingival sulcus, with the bristles at an angle of about 45° to the long axis of the teeth. 3, do not make the bristles flex: light pressure, so that the end of the bristles into the gingival sulcus. 4, vibration of the toothbrush: a short distance (2 ~ 3cm) horizontal brush and vibration of the toothbrush, but do not make the end of the bristles away from the gingival sulcus, each area at least 10 times vibration. 5.Reposition of the toothbrush: move the toothbrush to the next set of 2 ~ 3 teeth, pay attention to overlap. 6, repeat brushing: in the upper and lower jaw arch of the lip, tongue surface of each part of the repeated brushing. 7, Brush the lingual and palatal side of the front teeth position, place the toothbrush vertically on the lingual and palatal side of the front teeth, so that the bristles are vertical and point to and into the gingival sulcus. Disadvantages: brushing too hard can make the short distance brush into a strong friction and damage to the gingival margin. Brushing should pay attention to the problem of a toothbrush placed at the beginning of the part and the order of brushing the toothbrush placed at the beginning of the part can vary according to the habits of people, once set up, it is necessary to sequence gradually, in order to brush to the face. Each time the toothbrush is placed at a distance of 2 to 3 teeth. Each set brush 5 to 10 times, and then move to the next neighboring teeth position, the two brushing position should be overlapped between the mandibular teeth of the lip, cheek side, generally about 9 brushing position, tongue side of 11. Second, the scope and time of tooth brushing In order to ensure that the distribution of the amount of tooth brushing can completely cover all the tooth surface, according to the requirements of different brushing methods, the number of times each brushing area to complete the required repetitive brushing, in general, each brushing area needs 8 to 10 times. Or brushing time, such as 3 minutes; varies from person to person, due to the timing operation can not ensure that the brushing completely cover all the tooth surface, therefore, both the number of times the brush whisk each brushing area; also count the time of brushing, the combination of the two can help to achieve a better removal of plaque purpose. Third, the frequency of brushing Guidance on brushing, should emphasize the daily thorough removal of plaque, rather than simply emphasize the number of times a day to brush the teeth. However, teeth should be brushed at least twice a day, because after plaque is removed, new plaque is formed in 1 to 6 hours. The longer the bacteria are retained, the greater the potential for plaque to cause disease. Encourage cleaning your mouth before going to sleep. Bacteria can easily grow and multiply in the relatively static environment of the mouth, and it is very important to brush teeth before going to bed. Patients rinse their mouths with fluoride water before going to bed, or chew fluoride tablets or use gel should first remove plaque before proceeding, the effect is better. Fourth, supplemental brushing Some parts of the brush are often easy to ignore, for example, tongue, palate to the misaligned teeth. Cuspid and bicuspid attachment gingival area may be very small, brushing is often easy to cause damage. Another example is tilted teeth, mandibular molar teeth tilted to the lingual side, its lingual side, the exposed root surfaces, the osteoid and dentin surfaces; overlapping teeth or wide gaps, the need to use a vertical brush; adjacent to the tooth surface of the edentulous area, the exposed root divergence zone. As well as the right-handed brusher often ignores the upper and lower jaw of the right side of the cuspids and lateral incisors, the left-handed brusher just the opposite, the distal middle surface of the last teeth, the application of flossing assistance. All of these areas, which are easily overlooked or difficult to reach, should be given special attention when brushing, sometimes requiring supplemental brushing maneuvers, and sometimes supplemented by flossing, toothpicks, or interspace brushes. The entire oral cleaning should include tongue care. Because the tongue is one of the major concentrations of oral microorganisms and a major source of salivary microorganisms, the colonization of the tongue is not constant and changes frequently. Cleaning the tongue reduces the amount of oral food debris and microorganisms, delays plaque formation and overall plaque deposition, and contributes to overall oral cleanliness. You can use a toothbrush to brush and scrub, but also use a tongue scraper; but do not use too much force, clean the tongue every day to help freshen the breath.